Anchor for use in concrete



w. c. WALSH ANCHOR FOR U SE IN CONCRETE Filed April 7. 1937 Sept. 17, 1940.

WIN

INVENT OR.

LIAM C. MA -s11 BY ATTORNEY.

Patented Sept. 17,1940 7 UNITED STATES PATENT OFFICE Ill.

forty-nine per cent to James Rice, Chicago,

Application April 7, 1937, Serial N 0. 135,389

6 Claims.

This invention is an improvement in inserts forming anchors or supports to be mounted in concrete at, the time it is poured, to provide a base into which mounting or support members such as rods or the like may be mounted for the placement, outside of the wall floor or ceiling in which the anchor or support is mounted, of pipes, electrical fixtures, etc., and for the other uses herein set forth.

One of the principal objects of this invention is to provide an anchor which will securely grip the surrounding concrete surfaces and provide an extremely secure mounting for rods retaining pipes and the like.

A further highly important object of the invention is the provision of an insert, anchor or support which is easy to manufacture and which requires a minimum of operations in the manufacturing process.

A further highly important object of the invention is the provision of an anchor, support, or the like which may be securely mounted on the usual concrete forms. with a single nail, screw or bolt.

Another object of this invention is to provide an article of the describedclass which will not be easily displaced from the forms when struck by any object or by the weight of the semi-solid concrete as it is poured around the same.

Another object of this invention is to provide an anchor for mounting in concrete or the like which will effectively prevent any of the concrete seeping around the lowermost edges thereof, displacing the anchor or causing an irregular or angular surface to be presented on the exposed face of the concrete when the forms are removed.

A still further important object of the invention is to provide an article of the described class which may serve as a base or mounting for a block and tackle, for the obvious'uses of such equipment in a building or during construction of the building.

A further object of the invention is the provision of an anchor having an insertable plug or disc, said disc to be mounted on concrete forms, before concrete is poured therein and which may be easily aligned with other anchors or discs.

Another object of the invention is the provision of an article substantially as described wherein the nail, bolt or screw used to attach the device to the forms may be removed and disposed of and also, wherein the face surface exposed after the forms are removed does not present other than a most sightly appearance.

Another highly important object of this invention is to provide means whereby any errors of alignment of the anchors and the pipes or the 5 like to be suspended therefrom. may be easily and immediately corrected without the necessity of setting a new anchor in the hardened concrete.

A still further highly useful and important object of my invention is the provision of a device substantially as described and for the purposes hereinbefore set forth, whereby a plurality of pipes or the like may be mounted or suspended from the same anchor or base.

A still further important object of the invention is to provide an insert for concrete or the like which may be easily mounted in hard concrete and whereby the hole to be made for insertion of the same may be made by the use of conventional concrete boring equipment.

In the construction of buildings from concrete and the like it is necessary to'place or construct forms to hold the semisolid concrete until it becomes a solid mass. Suitable means must be provided for mounting the conventional pipes, and so forth, which are usually suspended from the ceilings.

While there are a number of devices patented and a few on the market designed to partially fulfill the general purpose of my device, all have certain inherent disadvantages such as the necessity of puncturing a large hole or a plurality of small holes in the form to place each anchor; being diflicult to align perfectly with one another; being easily displaced by slight pressure or when struckby any object; being alignable in one direction only; having no provision for additional suspension means for any later pipe installations; presenting an unsightly appearance in the face of the finished concrete and when mounted in the concrete after the same has hardened, necessitating the making of a large aperture which can not be made by the use of conventional concrete boring tools or machines.

It will be obvious from the drawing and the detailed description which follows that I have invented a device which has none of the disadvantages noted in the paragraph above and has, in addition, those further advantages which are herein more particularly set forth.

On the drawing:

Fig. 1 is a side elevational view of a preferred form of my invention.

Fig. 2 is a cross sectional View of the preferred form shown in Fig. 1, taken on the line 2-2 of Fig. 1.

Fig. 3 is a plan View of the externally threaded disc or plug which is threadedly insertable in the base of each insert or anchor.

Fig. 4 is a cross sectional view of the disc or plug shown in Fig. 3 taken on the line 4-4 of Fig. 3.

Fig. 5 is a plan view of a modified form of hea for the anchor or insert, this one being a fiat circular head.

Fig. 6 is a plan view of still another modified form of head for my device, this one in the form of a perfect cross.

Fig. '7 is a plan view of still another modified form of head, this one presenting a top view like an elongated parallelogram.

As shown on the drawing:

The numeral i indicates the head which in the preferred form shown in Figs. 1 and 2 presents an appearance substantially like a hollowed out inverted cone terminating at its down turned end in the substantially narrow neck portion 2.

It will be obvious that the modified forms of heads shown in plan view in Figs. 5, 6 and 7, and designated as lb, lo and lo! respectively, as well as many other forms of heads not shown, can be satisfactorily used in conjunction with the neck portion set forth above and the base portion hereinafter mentioned. The chief essential requirement of the head portion is that it be of such a shape, size and relative strength that it will form an effective anchor in the concrete when the concrete has become hard.

In the preferred form of head shown in Figs. 1 and 2 a plurality of preferably horizontal holes or apertures, indicated by the numerals !-a are provided through the side walls of the inverted conical head in cross registry with each other. These serve a dual purpose in that, if desired, a

rod or wrench may be passed therethrough to effectively screw down the main body portion on the disc and against the form when the disc, later described, is mounted thereon. The secondary purpose of these holes or apertures ia is to allow the optional placement therein of permanent rods forming an additional anchor or locking means in the concrete when the same is hard.

The neck portion indicated by numeral 2 in preferred form is formed integral with the base, described below and connects the head and the base. The said neck 2 is preferably round in cross section, and is always smaller than the head and may be smaller in diameter than the base 3. It will be obvious that when concrete is poured around the body of the insert it will imbed the neck and head, effectively locking the anchor in place once the concrete has hardened.

As shown in Figs. 1 and 2, formed below the neck 2 is the hollowed out base, preferably circular in shape, indicated by the numeral 3. In preferred form the base is approximately the same diameter as the vvidemost portion of the head I, or any modification thereof shown or described. A circular perpendicularly extending hole or aperture 3a is formed in the base 3, substantially as shown, and screw threads indicated by the numeral 3-b are formed therein adapting the aperture to threadably receive the externally threaded disc or plug shown in Figs. 3 and 4. The hole 3a must be slightly deeper than the thickness of the disc or plug 4 to allow the annular face portion 3-c to be screwed tight against the form on which disc or plug 4 is mounted.

Shown in Figs. 3 and 4 is the plug or disc indicated by the numeral 4. The circular external periphery of said disc 4 has formedthereon the screw threads la. to allow the same to be threadably screwed into aperture 3a in base 3, operably contacting screw threads 3-b in said base 3.

The numeral 4a indicates a single hole or aperture preferably located centrally in disc 4 and passing therethrough as shown in Fig. 4. As further shown in Fig. 4, the central aperture or hole 4-a is not threaded and is adapted to receive a nail, screw or bolt 5 which is adapted to releasably fasten disc 4 to the conventional concrete forms.

The numeral 4b indicates a plurality of apertures, or holes arranged in spaced relation to one another, passing entirely through disc l. The numeral 5 -0 indicates the internally formed screw threads in apertures i b so made that hanging arms, rods or the like may be threaded therein to support pendant pipes or the like.

In the construction of buildings and the like by the use of poured concrete it is customary for suitable forms to be first mounted in place. The concrete is then poured into the forms and after the concrete has hardened or set the forms are then removed. Pipes for the conduction of water, steam, electric cables and the like can not usually be laid in the concrete because of the difficulty of access to them should trouble develop therein at any time. It is usually customary to mount the pipes slightly below the usual ceiling, and to do this a suitable series of anchors must be provided and laid in the concrete at the time it is poured. The architects specifications generally show where anchors must be provided for the purposes set forth.

To use my concrete insert all that is necessary is that the workman lay out his line for the desired inserts or anchors on the concrete forms and to securely mount a series of the discs shown in Figs. 3 and 4 on the proper line in the form by means of nails, bolts or screws 5. Another workman may then follow the one placing the discs on.

the forms and securely screw down the main body portion of the anchor, shown in Figs. 1 and 2, on the disc and tight against the form so that the semisolid concrete poured in the form can not seep there-around. It will be obvious that an insert or anchor thus firmly attached to the form can not be displaced without considerable force being used upon it. The displacement of anchors is one of the most usual troubles encountered in construction of concrete buildings. Often the displacement is only partial resulting in a crookedly mounted anchor, which must later be removed from the hardened concrete and replaced therein in proper alignmentthis a most expensive and annoying procedure.

After the inserts or anchors have been securely mounted on the forms the concrete is poured, tamped and leveled down. It will be obvious that when the concrete is tamped it will envelop the head and neck of the invention and that when the concrete has hardened my insert, and particularly that preferred form shown in Figs. 1 and 2, will be securely locked in place.

After the concrete has hardened the forms may then be removed by pulling them. away from the screws or the like 5. Discs 4 and the annular bottom portion 3-0 will then be flush with the exposed ceiling or wall, and discs 4 may then be screwed out of the base 3, the nail, screw or bolt 5 may then be disposed of, and disc 4 may then be screwed back into its original and final position. The conventional mounting rods (not shown) may then be screwed into the proper hole in the disc.

If, for any reason, the exposed disc should be a few inches out of true alignment with the discs in any other anchor it is a simple matter to turn the same until the desired threaded hole tb comes into the proper alignment. Also, it is to be noted that one or more additional rods may be placed in the disc, if necessary, to hang additiona1 pipes or the like. Further, it is possible to make holes 4b in various diameters to accommodate any desired size of rod or hanger without departing from the essential scope of the invention above described.

Various changes may be made in the embodiment of the invention herein specifically described without departing from or sacrificing any of the advantages of the invention or any features thereof, and nothing herein shall be construed as limitations upon the invention, its concept or structural embodiment as to the whole or any part thereof except as defined in the appended claims.

I claim:

1. In an article of the described class the combination of a disc having a central aperture extending therethrough adapting said disc to be mounted on a form for moulding a plastic material, means in said disc for mounting pendant rods or the like, screw threads on the lateral periphery of said disc, a main body portion consisting of a base having an internally threaded downwardly extending aperture therein, adapted to receive and retain said disc, a neck portion connected to said base and relatively smaller in diameter than the base and a head portion laterally over-extending said neck portion and adapted to retain the body portion in said plastic material.

2. In an insert for mounting in concrete adapted to be used as an anchor, the combination of a head formed in the shape of an inverted cone and terminating in a centrally located neck formed integral therewith and connecting the head with an integral base having an internally threaded central perpendicularly extending aperture therein, an externally threaded disc having a central aperture extending therethrough adapted to receive a means to fasten said disc to a form and also having a plurality of spaced apart internally threaded holes adapted to receive a plurality of pendant rods, said disc adapted to be threadably and adjustably retained in said aperture in said base.

3. In an article of the class described the combination of a body portion consisting of a head, substantially in the shape of an inverted cone and having a downwardly extending central aperture therein forming a hollow internal portion in said head and having a plurality of apertures in the sides thereof in cross-registry with one another adapted to receive a rod or the like, said head formed integral with a substantially narrow neck portion, a neck portion, a base portion formed integral with said head and neck and having an internally threaded circular perpendicularly extending aperture therein adapted to retain a disc, and a disc having an unthreaded central hole therein adapted to reoeive a fastening means for fastening said disc to a form and having a plurality of threaded holes in spaced relation to said central hole and to one another and adapted to adjustably retain pendant rods or the like therein.

4. In a device of the class described the combination of a circular head formed substantially in the form of a disc and terminating in a centrally located neck formed integral therewith and connecting the head with an integral base having an internally threaded central perpendicularly extending aperture therein, an externally threaded disc having a central aperture extending therethrough adapted to receive a means to fasten said disc to a form and also .having a plurality of spaced apart internally threaded holes adapted to receive a plurality of pendant rods, said disc adapted to be threadably and adjustably retained in said aperture in said base.

5. In an insert to be mounted in concrete the combination of an externally threaded disc having a centrally located unthreaded perpendicular aperture therein adapted to receive a nail or screw to fasten said disc to a form, said disc also having a plurality of internally threaded perpendicular apertures therein adapted to be exposed when the form is removed and to threadably receive pendant rods or the like, a body portion consisting of a base having an internally threaded perpendicular aperture therein to threadably receive said disc, a neck portion relatively smaller than said base, and a head portion also relatively larger than said neck portion, said head portion being substantially in the shape of an inverted cone and having a perpendicularly extending aperture therein forming a circular hollowed out head, said hollowed out head also having a plurality of horizontal apertures passing therethrough in cross registry with one another to receive a stub rod or the like.

6. In an article of the described class, the combination of a disc adapted to be fastened to a form before a plastic is poured thereinto, disposable means for temporarily fastening said disc to a form, screw threads on said disc, a body portion having a threaded bottom aperture therein to receive said disc, said body portion being adapted to be turned down rightly on said disc on said form toprevent displacement thereof when a plastic is poured thereover, said disc and said bottom aperture in said body being exposed in the face of the hardened plastic when the forms are removed, and means on said disc for retaining pendant rods or the like, for the purposes set forth.

WILLIAM C. WALSH. 

